There's nothing quite like being among a gaggle of bellowing Buells in close formation on a winding road, but it does require a certain degree of trust, mutual respect and time-served experience of how the others ride (call it 'group dynamics') to enjoy it safely.
As 03 said, this used to happen regularly in the good 'ol days (fond memories of our regular Sunday afternoon blasts in Hants/Sussex/Surrey), but people come and go and that dynamic easily gets lost.
Recently, meets have been just that, meets. People turn up solo or with a mate or two and leave in similar manner.
But there's nothing to stop you organising a ride out, post it in Events and see what happens...